Air and feed-water pump for condensing-engin es



(No Model.)

J. A, SHEPARD. AIR AND FEED WATER PUMP POR GONDENSING ENGINES.

No, 412.048. Patented 0st. 1, 1889.

Witwe/wao UNITED STATES JAMES A. SHEPARD, OF HAVANA, NEXV YORK.

AIR AND FEED-WATER PUMP FOR CONDENSlNG-ENGINES.

SPECIFICATION forming part of Letters Patent No. 412,048, dated October1, 1889. Original application filed August 27, 1887, Serial No. 247,998.Divided and this application filed April 9, 1888. Serial No.

To all whom it may concern:

Be it known that I, JAMES A. SHEPARD, of Havana, in the county ofSchuyler, in the State of New York, have invented new and usefulImprovements in Air and Feed-later Pumps for Condensing-Engines, ofwhich the following, taken in connection with the accompanying drawings,is a full, clear, and exact description.

My invention relates to certain new and useful improvements infeed-water pumps for steam-boilers, the present application being adivision of an application filed by me August 27, 1887, Serial No.247,998, wherein the invention is illustrated and its functionsdescribed in connection with a steam-engine and a steam-boiler ot novelconstruction.

In the accompanying drawing, illustrative of my invention, I have shownthe same in central vertical section.

In said drawing, A indicates a pump consisting of an upright barrel orcase provided at its base with an induction-valve V, above which is thepiston P, of the 4form of a hollow cylinder open at the top, andprovided at its bottom with a litt-valve V. The said piston is operatedby a rod J', driven from any suitable source ot' power-as, for instance,anl eccentric on the driving-shaft of the steamengine on which it isemployed, asillustrated and described more fully in my said pendingapplication.

Below the induction-valve V the pumpcase A is provided with aninlet-opening m, whereby it is adapted to communicate with a pipeleading from the interior of a steam-condensing chamber, which receivesthe exhaust from the steam-engine, the arrangement being such that thepist-on P will pump through said pipe the water of condensation and airfrom the steam-condensing chamber of said condenser, as in the apparatusshown in my aforesaid pending application. The upper part of theaforesaid pump-case is provided in its side with a vert-ical slot a anda port b above said slot. To the exterior of this slotted side of thepump-case Aie firmly secured a supplemental pump-case A which has anopening in the side adjacent to the case A and coinciding with the slota and port l?. In vertical guide-channels through the upper (No model.)

and lower ends of the supplemental pumpcase A slides the supplementalpiston P', which is actuated by the piston P of the pump by means of thepin d, which couples the rod J to the piston P, and projects through theslot o, and has its end lirmly attached to the supplemental piston P. Itwill be noted that the piston P is hollowed out at its lower end at :15,and is provided with slots s and s openin g into said hollowed-outportion, thereby providing for the proper working of the apparatus. Thelower end of the supplemental pump-case A is provided with adischarge-opening', fromwhich leads a pipe n to the water-space of theboiler.

In the operation of the invention the pump A draws the water ofcondensation and air from the condenser and transfers said water to thesupplemental pump A through the port h, whence it is forced into theboiler by the said supplementalpump. In order to insure the addition ofa further quantity of feed-water to the boiler than that furnished bythe water of condensation only, I provide at some part of the apparatusthrough which the water of condensation is passing (for instance, thepump A) a supply-pipe, so as to admit additional feed-water with thewater of condensation, the mixture of the two being then forced into theboiler.

In the drawing I have illustrated at m the inlet-opening of saidfeed-water pipe, which may conveniently extend to and tap thewaterjacket of a condenser of the kind shown in my aforesaid pendingapplication, said pipe being provided with the usual stop-cock forregulating the quantity of supply to the pump.

Having thus described my invention, what I claim is- 1. In a feed-waterpump for steam-boilers, the combination, with the air-pump A, providedWith the piston P, and having the con denser-pipe inlet-opening m forthe admission of the water of condensation, of the boiler feed-forcepump A', provided with the piston P and the cross-head pin CZ,connecting said pistons and inclosed within said pumps A and A',substantially as described.

2. The combination of the pump-case A, provided with the induction-valveV at the base, the vertical slot uy in its side, and the IOO port habove said slot, the piston P, provided with the lift-valve V ,thesupplemental pump- Case A provided with the discharge-pipe fn, and openat its side and secured at said side to the side of the ease A, havingthe aforesaid slot and port, and the piston P connected with the pistonP by the coupling-pin d, projecting through the slot af, substantiallyas described.

In testimony whereof I have hereunto 1o signed. my name, in the presenceof two Wituesses, at Havana, in the county of Schuyler, in the State ofNew York, this 24th day of March, 1888.`

JAMES A. SHEPARD. [L s] Witnesses:

ANsEL ROBERTS, IRA G. WHEAT.

